The wizard Tasha has gathered bits and bobs of precious lore during her illustrious career as an adventurer. Her enemies wouldn't want these treasured secrets scattered across the multiverse, so in defiance she has collected and codified them for the enrichment of all! Baked into this book are rule options for all the characters classes in the Player's Handbook-- including new subclasses. And the book is sprinkled with the archmage's musings on everything...

"Saviors of the multiverse! When a cosmic enemy threatens to destroy their world, brave heroes must do everything in their power to save it. This quest will take them across the teeming oceans of Wildspace to the silvery void of the Astral Sea and beyond. Along the way, they'll make friends, encounter terrifying foes, and face one cliffhanger after another. Can they save their world before time runs out? Light of Xaryxis is a Dungeons & Dragons adventure...